Superparamagnetism and spin-glass like state for the MnFe2O4 nano-particles synthesized by the thermal decomposition method

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	Superparamagnetism and spin-glass like state for the MnFe2O4 nano-particles synthesized by the thermal decomposition method
	R. R. Gao; Y. Zhang; W. Yu; R. Xiong; J. Shi
	2012
发表期刊	Journal of Magnetism and Magnetic Materials
ISSN	0304-8853
卷号	324 期号:16 页码:2534-2538
摘要	MnFe2O4 nano-particles with an average size of about 7 nm were synthesized by the thermal decomposition method. Based on the magnetic hysteresis loops measured at different temperatures the temperature-dependent saturation magnetization (M-S) and coercivity (H-C) are determined. It is shown that above 20 K the temperature-dependence of the M-S and H-C indicates the magnetic behaviors in the single-domain nano-particles, while below 20 K, the change of the M-S and H-C indicates the freezing of the spin-glass like state on the surfaces. By measuring the magnetization-temperature (M-T) curves under the zero-field-cooling (ZFC) and field-cooling procedures at different applied fields, superparamagnetism behavior is also studied. Even though in the ZFC M-T curves peaks can be observed below 160 K, superparamagnetism does not appear until the temperature goes above 300 K, which is related with the strong inter-particle interaction. (C) 2012 Elsevier B.V. All rights reserved.
部门归属	[gao, ruo-rui; zhang, yue; yu, wei; xiong, rui; shi, jing] wuhan univ, sch phys & technol, minist educ, key lab artificial micro & nanostruct, wuhan 430072, peoples r china. [zhang, yue] huazhong univ sci & technol, dept elect sci & technol, wuhan 430074, peoples r china. [xiong, rui; shi, jing] hubei univ, minist educ, key lab green preparat & applicat funct mat, wuhan 430062, peoples r china. [shi, jing] acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;zhang, y (reprint author), wuhan univ, sch phys & technol, minist educ, key lab artificial micro & nanostruct, wuhan 430072, peoples r china.;yue-zhang@mail.hust.edu.cn
关键词	Mnfe2o4 Nano-particle Superparamagnetism Spin-glass Like State Thermal Decomposition Cofe2o4 Nanoparticles Magnetic-properties Mfe2o4 m Hydrothermal Synthesis Ferrite Nanoparticles Mn Nanoparticles Co Dependence Size Fe
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59959
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. R. Gao,Y. Zhang,W. Yu,et al. Superparamagnetism and spin-glass like state for the MnFe2O4 nano-particles synthesized by the thermal decomposition method[J]. Journal of Magnetism and Magnetic Materials,2012,324(16):2534-2538.
APA	R. R. Gao,Y. Zhang,W. Yu,R. Xiong,&J. Shi.(2012).Superparamagnetism and spin-glass like state for the MnFe2O4 nano-particles synthesized by the thermal decomposition method.Journal of Magnetism and Magnetic Materials,324(16),2534-2538.
MLA	R. R. Gao,et al."Superparamagnetism and spin-glass like state for the MnFe2O4 nano-particles synthesized by the thermal decomposition method".Journal of Magnetism and Magnetic Materials 324.16(2012):2534-2538.